$NetBSD$

--- src/VBox/Runtime/r3/netbsd/mp-netbsd.cpp.orig	2016-07-07 07:08:47.050526272 +0000
+++ src/VBox/Runtime/r3/netbsd/mp-netbsd.cpp
@@ -0,0 +1,200 @@
+/*  mp-netbsd.cpp $ */
+/** @file
+ * IPRT - Multiprocessor, NetBSD.
+ */
+
+/*
+ * Copyright (C) 2008-2015 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP RTLOGGROUP_SYSTEM
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/sysctl.h>
+
+#include <iprt/mp.h>
+#include <iprt/cpuset.h>
+#include <iprt/assert.h>
+#include <iprt/string.h>
+#include <iprt/alloc.h>
+#include <iprt/log.h>
+#include <iprt/once.h>
+#include <iprt/critsect.h>
+
+
+/**
+ * Internal worker that determines the max possible CPU count.
+ *
+ * @returns Max cpus.
+ */
+static RTCPUID rtMpNetBsdMaxCpus(void)
+{
+    int aiMib[2];
+    aiMib[0] = CTL_HW;
+    aiMib[1] = HW_NCPU;
+    int cCpus = -1;
+    size_t cb = sizeof(cCpus);
+    int rc = sysctl(aiMib, RT_ELEMENTS(aiMib), &cCpus, &cb, NULL, 0);
+    if (rc != -1 && cCpus >= 1)
+        return cCpus;
+    AssertFailed();
+    return 1;
+}
+
+
+RTDECL(int) RTMpCpuIdToSetIndex(RTCPUID idCpu)
+{
+    return idCpu < RTCPUSET_MAX_CPUS && idCpu < rtMpNetBsdMaxCpus() ? idCpu : -1;
+}
+
+
+RTDECL(RTCPUID) RTMpCpuIdFromSetIndex(int iCpu)
+{
+    return (unsigned)iCpu < rtMpNetBsdMaxCpus() ? iCpu : NIL_RTCPUID;
+}
+
+
+RTDECL(RTCPUID) RTMpGetMaxCpuId(void)
+{
+    return rtMpNetBsdMaxCpus() - 1;
+}
+
+
+RTDECL(bool) RTMpIsCpuOnline(RTCPUID idCpu)
+{
+    /*
+     * NetBSD doesn't support CPU hotplugging so every CPU which appears
+     * in the tree is also online.
+     */
+    char    szName[40];
+    RTStrPrintf(szName, sizeof(szName), "dev.cpu.%d.%%driver", (int)idCpu);
+
+    char    szDriver[10];
+    size_t  cbDriver = sizeof(szDriver);
+    RT_ZERO(szDriver);                  /* this shouldn't be necessary. */
+    int rcBsd = sysctlbyname(szName, szDriver, &cbDriver, NULL, 0);
+    if (rcBsd == 0)
+        return true;
+
+    return false;
+}
+
+
+RTDECL(bool) RTMpIsCpuPossible(RTCPUID idCpu)
+{
+    return idCpu != NIL_RTCPUID
+        && idCpu < rtMpNetBsdMaxCpus();
+}
+
+
+RTDECL(PRTCPUSET) RTMpGetSet(PRTCPUSET pSet)
+{
+    RTCpuSetEmpty(pSet);
+    RTCPUID cMax = rtMpNetBsdMaxCpus();
+    for (RTCPUID idCpu = 0; idCpu < cMax; idCpu++)
+        if (RTMpIsCpuPossible(idCpu))
+            RTCpuSetAdd(pSet, idCpu);
+    return pSet;
+}
+
+
+RTDECL(RTCPUID) RTMpGetCount(void)
+{
+    return rtMpNetBsdMaxCpus();
+}
+
+
+RTDECL(PRTCPUSET) RTMpGetOnlineSet(PRTCPUSET pSet)
+{
+    RTCpuSetEmpty(pSet);
+    RTCPUID cMax = rtMpNetBsdMaxCpus();
+    for (RTCPUID idCpu = 0; idCpu < cMax; idCpu++)
+        if (RTMpIsCpuOnline(idCpu))
+            RTCpuSetAdd(pSet, idCpu);
+    return pSet;
+}
+
+
+RTDECL(RTCPUID) RTMpGetOnlineCount(void)
+{
+    /*
+     * NetBSD has sysconf.
+     */
+    return sysconf(_SC_NPROCESSORS_ONLN);
+}
+
+
+RTDECL(uint32_t) RTMpGetCurFrequency(RTCPUID idCpu)
+{
+    int uFreqCurr = 0;
+    size_t cbParameter = sizeof(uFreqCurr);
+
+    if (!RTMpIsCpuOnline(idCpu))
+        return 0;
+
+    /* CPU's have a common frequency. */
+    int rc = sysctlbyname("dev.cpu.0.freq", &uFreqCurr, &cbParameter, NULL, 0);
+    if (rc)
+        return 0;
+
+    return (uint32_t)uFreqCurr;
+}
+
+
+RTDECL(uint32_t) RTMpGetMaxFrequency(RTCPUID idCpu)
+{
+    char szFreqLevels[20]; /* Should be enough to get the highest level which is always the first. */
+    size_t cbFreqLevels = sizeof(szFreqLevels);
+
+    if (!RTMpIsCpuOnline(idCpu))
+        return 0;
+
+    memset(szFreqLevels, 0, sizeof(szFreqLevels));
+
+    /*
+     * CPU 0 has the freq levels entry. ENOMEM is ok as we don't need all supported
+     * levels but only the first one.
+     */
+    int rc = sysctlbyname("dev.cpu.0.freq_levels", szFreqLevels, &cbFreqLevels, NULL, 0);
+    if (   (rc && (errno != ENOMEM))
+        || (cbFreqLevels == 0))
+        return 0;
+
+    /* Clear everything starting from the '/' */
+    unsigned i = 0;
+
+    do
+    {
+        if (szFreqLevels[i] == '/')
+        {
+            memset(&szFreqLevels[i], 0, sizeof(szFreqLevels) - i);
+            break;
+        }
+        i++;
+    } while (i < sizeof(szFreqLevels));
+
+    /* Returns 0 on failure. */
+    return RTStrToUInt32(szFreqLevels);
+}
